"Although you can use the Lap Sharp dry, the basic kit includes a spray bottle for wetting the abrasive. The water cools the tool and carries away the swarf, which extends the abrasive life.

To a purist, many of these features are critical. If "good enough" is a concept repellent to you, this is your power sharpener. You can lap tool backs flat, not just flat enough. You get the benefit of wet sharpening without the waterpark mess."